| 摘要 |
A transfer case for a vehicle having two-wheel drive and four-wheel drive operating modes operatively established by a drive transfer mechanism that is selectively employed to interconnect a main power drive shaft construction for the drive of a first set of wheels with an auxiliary drive shaft for the drive of a second set of wheels. The drive transfer mechanism includes a clutch assembly package comprising a control rod supported for movement in a direction coaxial to the longitudinal axis of the auxiliary drive shaft. The clutch assembly includes a clutch collar supported within the auxiliary drive shaft on the control rod for movement therewith to alternately connect and disconnect the power shaft with the auxiliary drive shaft. For multi-ratio case operation, the power shaft construction may have an input and output power shaft sections that are selectively interconnected by a planetary gear set and a speed shift collar. The shift collar is shifted by a second actuator that includes a second control rod supported for rectilinear movement along a longitudinal axis may be parallel to the longitudinal axis of the auxiliary drive shaft. The second control rod moves in response to an input shifting force to effect corresponding movement of a shift fork supported thereon to alternatively interconnect the input power shaft section directly to the output power shaft section via the speed shift collar for high speed operation and indirectly via the planetary gear set and the speed shift collar for low speed operation.
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